bromomethyl cyclopentanecarboxylate 、 tert-butyl N-[2-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4,6-bis(trifluoromethyl)-1,7a-dihydropyrazolo[3,4-d]pyrimidin-3-yl]-N-[(2-methylpropan-2-yl)oxycarbonyl]carbamate 在
potassium carbonate 作用下,
以
丙酮 为溶剂,
以59%的产率得到(3-(bis-(tert-butoxycarbonyl)amino)-2-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4,6-bis(trifluoromethyl)-2,7a-dihydro-1H-pyrazolo[3,4-d]pyrimidin-1-yl)methyl cyclopentanecarboxylate